Latest Podcast: “Empowering Your Team to Deliver Technology Solutions On Time” - an Interview with Calline Sanchez, VP of Global Service & Solution Planning, IBM

Get Unstuck. 
Master Your Mindset. 
Unlock Your True Impact.

Mental Toughness and High Performance Coaching, Speaking, Training and Digital Curriculum Based on the Limitless Leader System

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Private 1:1 Coaching for Leaders

If you are feeling stuck and wanting to reach your next level of impact, then private and confidential 1:1 High Performance coaching could be a great fit. Sheryl will coach you using the world's most scientific and proven process for mastering the mindset and habits required to achieve the impact you want and deserve. Could this be just what you need?

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Corporate and Team Training

The challenges facing women professionals and male allies in corporate America are real… dealing with overwhelm, managing the new normal, meeting the demands of an evolving workplace and more. We'll customize the Limitless Leader system to help corporations and teams develop the mindset to be sustainable leaders during disruptive times.

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Sheryl works with businesses and organizations that want to drive High Performance. Her presentations, workshops and small group talks on Mental Toughness have inspired and enlightened audiences at Google Ventures, Bank of America, Microsoft, Watermark, Autodesk, CapitalOne, VMware, Pixar, and Black Girls Code to name a few.

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 Create a 90-Day Plan to Gain Clarity on Your Next Level of Impact • Leverage an Accountability Structure to See It Through • Unlock Your Super Powers

In this free resource, you’ll apply some of the same tools that Olympians and senior leaders use to get clear on what’s most important today for maximum impact over the next three months



Want to Unlock the Limitless Leader Within You?

This is the one and ONLY step-by-step coaching system specifically for ambitious, heart-centered female leaders, emerging leaders, and male allies to go from feeling silenced, stuck, or overlooked to being Limitless Leaders who are heard, supported, and recognized.

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What is "Mental Toughness?"

Mental Toughness is a tool to assist purpose-driven individuals and teams to gain the mindset required to be world-class, consistently. If you or your team are underperforming due to fear, doubt or lack of clarity or confidence, especially in high-pressure or high-stakes situations, I can help!


Brands Who Have Trusted Me:

"I can honestly say that my confidence has increased in every way, and I now feel like I am a force to be reckoned with. In the last three months, our North American team was awarded the highest market share growth in US in work from home category by NPD along with other significant milestones. My level of influence, from being able to successfully challenge our CEO, to empowering my team and gaining the respect of my peers, has gone up 10 fold. I couldn’t be happier with how this year has gone and with the coaching I’ve received from Sheryl."

Kelly Nagel
President & General Manager, Jabra N.A.

"Sheryl and her Limitless Leader System has helped me go from playing smaller than I could in terms of my title and area of influence, despite a high level of expertise to recognizing my title as CRO and speaking up about it. I now own my worth, and I’m positioned accurately with more confidence than ever. This makes me feel much more powerful and in control of my destiny. This is a win/win for myself and my organization. "

Christina West
Vice President & General Manager, Infinity West Partners

"Prior to working with Sheryl Kline, I would have been far more anxious about performing in front of our highest leadership, and I would have played safe. Without the tools I learned from Sheryl, I would have had a seat at the table, but the board meeting would have ended as it normally ends, good but far less impactful. The board meeting ended with my comments and with the board members saying 'If I could have recorded your comments to play for our 80,000 employees, I would.' THIS WAS ONE OF THE HIGHLIGHTS OF MY CAREER! This level of impact would have never happened without my work with Sheryl."

Female National Accounts Sales Manager
Fortune 100 Company

"Sheryl, you've been an incredible source of inspiration to me and I'm very appreciative of all the work you are doing to empower women to make their voices heard. Here's to a powerful 2021!"

Tina Schackman, CFA
Principal, Senior Retirement Plan Consultant, BFSG, LLC and Co-Chairperson, Women in Pensions Network

"I'm managing principal of a leading financial planning company. How did I get to this point? Well, one of the things that I did just prior to passing my CFP license was work with Sheryl Kline... it was one of the most insightful things I've done in my career. The transformation I experienced was a result of the profound help that Sheryl delivered. She gave me her time, asked the right questions, and provided me with great tools. I am so thankful!"

Kim Rosenberg, CFP
Managing Partner, Rosenbaum Financial

"There are two advantages that I got from executive coaching with Sheryl. The primary advantage has been confidence that I am a high performer. That’s something that I don’t think I knew terribly much about myself. The second thing is just upping my own self-awareness of the skills I already have, and the skills that I need to work on."

Naomi Mercer
SVP for Diversity, Equity, and Inclusion, American Bankers Association

"Sheryl’s book resonates with me. It will revolutionize and unleash our ability to have an impact when we’ve never needed it more."

Kellie McElhaney
Distinguished Teaching Fellow, UC Berkeley Haas School of Business

"I was struggling with prioritization and organization, balancing the many demands of life and maintaining a focus that isn’t overcome with the many distractions I face on a daily basis. These have been three areas that have challenged me for a long time and I have spent time working to improve in these areas in the past with other coaches and through other programs. In working with Sheryl over the last three months, I can honestly say that I have felt dramatic improvement in each area and I am very grateful to her for her excellent coaching that has helped me become the best version of me!"

Michael Sollazo
Partner and Wealth Management Counsel, Capital Planning Advisors

"I contacted Sheryl Kline when I was feeling lack of focus and sense of achievement with my day to day life. Coincidentally, my daughter was taking her Mental Toughness online course as part of participating in the club volleyball team. While listening to some of the video lectures, it dawned on me that adults could use the skills she was teaching teens. Sheryl has helped me clarify priority for my life, and not just what is important to me, but WHY it is important to me. This has helped focus my energy to what matters most to me, and as a result I feel more in control. I have also regained the sense of calm even when I am overwhelmed with the amount of juggling I deal with personally and professionally. I highly recommend Sheryl and her Mental Toughness program – if you are looking to improve the outlook for your life by feeling productive and purposeful, this program will help you get there."

Sr.-Level Project Manager
Data Security Company, Mountain View, CA

"I invited Sheryl to be a guest panelist for our Female Start-Up Founder Speaker Series. Our topic was 'Mental Toughness for Women in High-Tech Start-Ups'. Sheryl's content was well-thought out, innovative and impactful. Sheryl connected easily with our audience and provided clear actionable take-aways on how to be more Mentally Tough, especially in high pressure situations and also strategies to recover when setbacks occur. Sheryl delivered, and we'll definitely have her back."

Amy Bunszel
Executive Vice President, Architecture, Engineering and Construction Design, Autodesk

What Sets Me Apart

I'm a Mental Toughness and Certified High Performance Coach™, best-selling author, speaker, moderator and mother of three great adult kids. I'm also the CEO and Founder of The Zone Lab, LLC, and my area of expertise is Mental Toughness and High Performance.

In an effort help companies and organizations further develop change agents, I created the “Limitless Leader” Program… the ONLY step-by-step coaching system specifically for ambitious, heart-centered female leaders, emerging leaders and male allies to go from feeling silenced, stuck or overlooked to being a Limitless Leader who is heard, supported and recognized.

For the last 25 years, I have been working with business professionals and world-class athletes to help them master their mindset and influence, so they can speak up, be heard and unlock their next level of impact, consistently and sustainably. I have also sat on and moderated panels, and conducted local and global workshops at Hewlett Packard Enterprise, Google Ventures, Autodesk, Microsoft, Capital One, Pixar, Jabra, State Street, VMware, UC Berkeley Haas School of Business, International Association of Women, SHRM and Bank of America to name a few.

In addition, I am the moderator of the “Limitless Leader LIVE” podcast on LinkedIn, and I've been a featured guest on various other national podcasts and radio shows. I'm also a Thrive Global Journal and ForbesWomen contributor. I have moderated a High Performance Leadership panel at Microsoft’s Women in Cloud Summit 2020, opened the recent Women of Silicon Valley Conference and delivered a standing-room only workshop. My book, ZONED IN: The Mental Toughness Required for a World-Class YOUrecently received honors as an Amazon #1 Best-Seller in Education/Leadership. 

I am also committed to giving back, most notably by teaching workshops for several non-profits, including: Kimberly Bryant’s Black Girls Code, Reshma Saujani’s Girls Who Code, Dan Cardiff’s Rally4Reading, Monica Nyiraguhabwa Girl Up Initiative Uganda and by speaking and serving as an ambassador for Jim Ziolkowski’s BuildOn.

When not sitting on panels, speaking, or coaching, I enjoy running with my black lab Kona, and just about anything outdoors with my husband, Scott.



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Contact Us

Find out if the Limitless Leader program for Mental Toughness and High Performance coaching is right for you, your department or your team.

Book a time to speak with Sheryl via phone or Zoom video conference.


The Zone Lab, LLC
3527 Mt. Diablo Blvd. #216
Lafayette, CA 94549
[email protected]
(925) 257-4257


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